Ето и следващия тест:
1. Which of these would be the best conductor of electricity? a; air
b; space
c; saltwater
d; glass
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2. What kind of modulation is shown in the picture? a; general modulation (GM)
b; frequency modulation (FM)
c; amplitude modulation (AM)
d; LW modulation (LM)
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3. What can be the heater voltage of a CRT tube non-sinus 6,3Veff the most precisely measured with? a; Digital Multimeter
b; Oscilloscope
c; RMS Digital Multimeter
d; ESR meter
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4. What is the best practical solution for making a resistance, on which during working 123V voltage falls and 22mA current flows, if we only have resistors with 1W? a; 6 pieces of 1Kohm resistors connected in series
b; 1 piece of 2,2Kohm and 1 piece of 3,3Kohm resistors connected in series
c; 3 pieces of 22Kohm and 1 piece of 1,2Kohm resistors connected in parallel
d; 2 pieces of 2,2Kohm and 1 piece of 1,2Kohm resistors connected in series
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5. How to repair the switching-mode power supply of a television? a; By wearing a wrist band that defends against static recharge
b; By wearing a pair of shoes that have isolated soles
c; We have to take care of plugging in the electric plug, because the grounding of the network has to get to the chassis of the equipment
d; By using an isolation transformer